carbide
Let an agent explain carbides, relay classification, properties, uses and hazards from chemistry and materials sources, route exposure or fire to emergency services, describe the named carbides and flag the uncertain alias, and distinguish carbides from carbonates, carbon allotropes, cemented carbide as a composite and organic compounds.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain carbides, relay classification, properties, uses and hazards from chemistry and materials sources, route exposure or fire to emergency services, describe the named carbides and flag the uncertain alias, and distinguish carbides from carbonates, carbon allotropes, cemented carbide as a composite and organic compounds.
A compound of carbon with a less electronegative element, classified as salt-like or ionic carbides such as calcium carbide, which reacts with water to release flammable acetylene, and beryllium carbide, which gives methane, covalent carbides such as silicon carbide and boron carbide, prized for hardness, and interstitial or metallic carbides such as tungsten carbide used in cutting tools and cementite in steel; the registry aliases include lanthanum, manganese, plutonium and uranium carbides, the actinide carbides studied as nuclear fuels, and allylenide, an old term for propynide salts that could not be fully verified. Calcium carbide must be kept dry because acetylene can explode, and some carbides are radioactive or toxic.
What it is for: Hard materials, chemical feedstocks and nuclear fuels.
It can be explain classification and properties; relay uses; describe named carbides; relay hazards.
Distinguishing features
Carbon anion or network
Extreme hardness in some
Water-reactive ionic forms
Nuclear fuel candidates
What it looks like
Varied: grey lumps of calcium carbide, black or green silicon carbide crystals and dense grey tungsten carbide.
Physical character
silicon carbide Mohs hardness: about 9-9.5 note
calcium carbide reaction: CaC2 + 2 H2O gives acetylene note
tungsten carbide density: about 15.6 g per cm3
How it is recognised
Compound of carbon with a less electronegative element
Lanthanum carbide, plutonium carbide, manganese carbide, uranium carbide, beryllium carbide, allylenide
Carbonates contain CO3 groups; allotropes are pure carbon; cemented carbide is a composite; organic compounds are carbon-hydrogen based
Related models
is a kind of - in registry terms
includes -
includes -
is contrasted with -
In practice
Families and kinds
ionic carbides
covalent carbides
interstitial carbides
actinide carbides
MXenes derived from carbides
Standards and regulation
Dangerous goods rules for water-reactive substances
Nuclear material regulations
Occupational exposure limits for cobalt and tungsten carbide dust
Failure modes and hazards
Acetylene explosions from wet calcium carbide
Hard metal lung disease from carbide dust
Radioactive actinide carbides
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.carbide
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What a carbide is.
Science.
Definition
Definition.
Definition
Definition.
- Has calcium carbide got wet in a confined space, caused a fire or has someone inhaled carbide dust and become ill, in which case evacuate and call emergency services? boundary
- What is a carbide, and how does it differ from carbonates, carbon allotropes, cemented carbide and organic compounds? definition
Named carbides
Named carbides.
Named carbides
Named carbides.
- What are lanthanum, plutonium, manganese, uranium and beryllium carbides, and what is allylenide? definition
- Which entry fits the specific carbide? action
Chemistry Classification.
Science.
Classes
Classes.
Classes
Classes.
- How do ionic, covalent and interstitial carbides differ? provenance
- Which references are standard? provenance
Reactions
Hydrolysis.
Reactions
Reactions.
- Why do some carbides release acetylene or methane with water? provenance
- Which sources are cited? provenance
Uses Uses.
Regulation.
Tools
Cutting tools.
Tools
Tools.
- How is tungsten carbide used in cutting tools and drilling? provenance
- Which entry fits cemented carbide? action
Nuclear
Nuclear fuels.
Nuclear
Nuclear.
- Why are uranium and plutonium carbides studied as nuclear fuels? provenance
- Which entry fits nuclear fuel? action
Context History.
Context.
Carbide lamps
Carbide lamps.
Carbide lamps
Carbide lamps.
- How did carbide lamps light mines and caves? provenance
- Which entry fits carbide lamp? action
Steel
Cementite.
Steel
Steel.
- What role does iron carbide play in steel? provenance
- Which entry fits cementite? action
What the second pass must settle
- The registry alias allylenide should be reviewed against propynide terminology
- Should actinide carbides be a separate entry?
- How should materials references be linked?